摘要
依托国家铁道试验中心试验线,在距线路一定距离处设置了多排桩与蜂巢桩2种隔振屏障,通过现场实测数据绘制2种隔振措施与无隔振措施下不同距离处的加速度时程与频谱曲线,并计算不同隔振措施下的最大Z振级,分析评价其隔振效果。研究结果表明:多排桩隔振效果较蜂巢桩好,多排桩减振量最大达到6.74 d B;但距2种隔振屏障10 m后几乎就不再有隔振效果甚至振动反而放大;多排桩隔振后振动频率主要集中在10~20 Hz,蜂巢桩隔振后振动频率在10 Hz附近。
Relying on the national railway test center test line,two kinds of vibration isolation barriers of multi-row piles and honeycomb piles were set at a certain distance from the line.Acceleration time-history curves and frequency spectrum curves under two kinds of isolation measures and no isolation measure at different distances were plotted based on f ield test data.The maximum degrees of Z direction vibration under different isolation measures were calculated and the vibration isolation effects were analyzed and evaluated.The results show that vibration isolation effect of multi-row pile is better than that of honeycomb pile,and the maximum damping of multi-row pile reaches 6.74 dB.However,after 10 m from the two kinds of vibration isolation barriers,there are almost no effects of vibration isolation or even vibration amplif ication.The vibration frequency under vibration isolation barriers of multi-row piles mainly concentrates at 10~20 Hz,and the vibration frequency under vibration isolation barriers of honeycomb piles is around 10 Hz.
作者
孙军
吴宗臻
晋杰
闫晓春
贾颜康
SUN Jun;WU Zongzhen;JIN Jie;YAN Xiaochun;JIA Yankang(The National Railway Test Center,China Academy of Railway Sciences,Beijing 100015,China;City Rail Transit Center,China Academy of Railway Sciences,Beijing 100081,China)
出处
《铁道建筑》
北大核心
2018年第4期147-150,共4页
Railway Engineering
基金
中国铁道科学研究院基金(2016YJ149
2017YJ142)
关键词
铁路环保
环境振动
现场试验
隔振屏障
隔振效果
多排桩
蜂巢桩
Railway environment protection
Environmental vibration
Field Test
Vibration isolation barrier
Vibration isolation effect
Multi-row pile
Honeycomb pile
作者简介
第一作者:孙军(1990—),男,工程师,硕士。E-mail:sunjun@rails.cn
